GPU Calc: unit test cases for NAN argument handling in PMT

Change-Id: I8f8e7a6220cff7e825a08fe16352478ea7090964
Signed-off-by: I-Jui (Ray) Sung <ray@multicorewareinc.com>
Signed-off-by: haochen <haochen@multicorewareinc.com>
GPU Calc: implement NAN argument handling in PMT

Change-Id: I1288a20652b4ceb66d90314f7acddb73506dfb43
Signed-off-by: I-Jui (Ray) Sung <ray@multicorewareinc.com>
Signed-off-by: haochen <haochen@multicorewareinc.com>